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Created August 25, 2020 21:29
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Untitled benchmark (http://jsbench.github.io/#a28de0dcb524c8c2988a27de465b8b0a) #jsbench #jsperf
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Untitled benchmark</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
<script src="./suite.js"></script>
</head>
<body>
<h1>Open the console to view the results</h1>
<h2><code>cmd + alt + j</code> or <code>ctrl + alt + j</code></h2>
</body>
</html>
Raw
suite.js
"use strict";
(function (factory) {
if (typeof Benchmark !== "undefined") {
factory(Benchmark);
} else {
factory(require("benchmark"));
}
})(function (Benchmark) {
var suite = new Benchmark.Suite;
Benchmark.prototype.setup = function () {
// Solution 1
var DecimalPrecision1 = (function() {
if (Math.sign === undefined) {
Math.sign = function(x) {
return ((x > 0) - (x < 0)) || +x;
};
}
if (Math.trunc === undefined) {
Math.trunc = function(v) {
return v < 0 ? Math.ceil(v) : Math.floor(v);
};
}
// Decimal round (half away from zero)
this.round = function(num, digits) {
num = (num + 'e').split('e');
num = Math.sign(+num[0]) * Math.round(Math.abs(+num[0]) + 'e' + (+num[1] + digits));
num = (num + 'e').split('e');
return +(num[0] + 'e' + (+num[1] - digits));
};
// Decimal ceil
this.ceil = function(num, digits) {
num = (num + 'e').split('e');
num = Math.ceil(num[0] + 'e' + (+num[1] + digits));
num = (num + 'e').split('e');
return +(num[0] + 'e' + (+num[1] - digits));
};
// Decimal floor
this.floor = function(num, digits) {
num = (num + 'e').split('e');
num = Math.floor(num[0] + 'e' + (+num[1] + digits));
num = (num + 'e').split('e');
return +(num[0] + 'e' + (+num[1] - digits));
};
// Decimal trunc
this.trunc = function(num, digits) {
num = (num + 'e').split('e');
num = Math.trunc(num[0] + 'e' + (+num[1] + digits));
num = (num + 'e').split('e');
return +(num[0] + 'e' + (+num[1] - digits));
};
return this;
})();
// Solution 2
var DecimalPrecision2 = (function() {
if (Number.EPSILON === undefined) {
Number.EPSILON = Math.pow(2, -52);
}
if (Math.trunc === undefined) {
Math.trunc = function(v) {
return v < 0 ? Math.ceil(v) : Math.floor(v);
};
}
this.isRound = function(num, digits) {
//return this.round(num, digits) === num;
return +num.toFixed(digits) === num;
};
// Decimal round (half away from zero)
this.round = function(num, digits) {
var e = 0.51 * Number.EPSILON * num;
var p = Math.pow(10, digits);
return Math.round((num + e) * p) / p;
};
// Decimal ceil
this.ceil = function(num, digits) {
if (this.isRound(num, digits))
return num;
var p = Math.pow(10, digits);
return Math.ceil(num * p) / p;
};
// Decimal floor
this.floor = function(num, digits) {
if (this.isRound(num, digits))
return num;
var p = Math.pow(10, digits);
return Math.floor(num * p) / p;
};
// Decimal trunc
this.trunc = function(num, digits) {
if (this.isRound(num, digits))
return num;
var p = Math.pow(10, digits);
return Math.trunc(num * p) / p;
};
return this;
})();
};
suite.add("Solution 1 (String) **/", function () {
/** Solution 1 (String) **/
DecimalPrecision1.round(0.5, 0);
DecimalPrecision1.round(-0.5, 0);
DecimalPrecision1.ceil(1e-8, 2);
DecimalPrecision1.floor(1e-8, 2);
DecimalPrecision1.round(5.12, 1);
DecimalPrecision1.round(-5.12, 1);
DecimalPrecision1.ceil(5.12, 1);
DecimalPrecision1.ceil(-5.12, 1);
DecimalPrecision1.floor(5.12, 1);
DecimalPrecision1.floor(-5.12, 1);
DecimalPrecision1.trunc(5.12, 1);
DecimalPrecision1.trunc(-5.12, 1);
DecimalPrecision1.round(1.005, 2);
DecimalPrecision1.round(39.425, 2);
DecimalPrecision1.round(-1.005, 2);
DecimalPrecision1.round(-39.425, 2);
DecimalPrecision1.ceil(9.130, 2);
DecimalPrecision1.ceil(65.180, 2);
DecimalPrecision1.ceil(-2.260, 2);
DecimalPrecision1.ceil(-18.150, 2);
DecimalPrecision1.floor(2.260, 2);
DecimalPrecision1.floor(18.150, 2);
DecimalPrecision1.floor(-9.130, 2);
DecimalPrecision1.floor(-65.180, 2);
DecimalPrecision1.trunc(2.260, 2);
DecimalPrecision1.trunc(18.150, 2);
DecimalPrecision1.trunc(-2.260, 2);
DecimalPrecision1.trunc(-18.150, 2);
DecimalPrecision1.round(1262.48, -1);
DecimalPrecision1.round(1262.48, -2);
});
suite.add("Solution 2 (Arithmetic) **/", function () {
/** Solution 2 (Arithmetic) **/
DecimalPrecision2.round(0.5, 0);
DecimalPrecision2.round(-0.5, 0);
DecimalPrecision2.ceil(1e-8, 2);
DecimalPrecision2.floor(1e-8, 2);
DecimalPrecision2.round(5.12, 1);
DecimalPrecision2.round(-5.12, 1);
DecimalPrecision2.ceil(5.12, 1);
DecimalPrecision2.ceil(-5.12, 1);
DecimalPrecision2.floor(5.12, 1);
DecimalPrecision2.floor(-5.12, 1);
DecimalPrecision2.trunc(5.12, 1);
DecimalPrecision2.trunc(-5.12, 1);
DecimalPrecision2.round(1.005, 2);
DecimalPrecision2.round(39.425, 2);
DecimalPrecision2.round(-1.005, 2);
DecimalPrecision2.round(-39.425, 2);
DecimalPrecision2.ceil(9.130, 2);
DecimalPrecision2.ceil(65.180, 2);
DecimalPrecision2.ceil(-2.260, 2);
DecimalPrecision2.ceil(-18.150, 2);
DecimalPrecision2.floor(2.260, 2);
DecimalPrecision2.floor(18.150, 2);
DecimalPrecision2.floor(-9.130, 2);
DecimalPrecision2.floor(-65.180, 2);
DecimalPrecision2.trunc(2.260, 2);
DecimalPrecision2.trunc(18.150, 2);
DecimalPrecision2.trunc(-2.260, 2);
DecimalPrecision2.trunc(-18.150, 2);
DecimalPrecision2.round(1262.48, -1);
DecimalPrecision2.round(1262.48, -2);
});
suite.on("cycle", function (evt) {
console.log(" - " + evt.target);
});
suite.on("complete", function (evt) {
console.log(new Array(30).join("-"));
var results = evt.currentTarget.sort(function (a, b) {
return b.hz - a.hz;
});
results.forEach(function (item) {
console.log((idx + 1) + ". " + item);
});
});
console.log("Untitled benchmark");
console.log(new Array(30).join("-"));
suite.run();
});
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